Asphalt Mixture Design and Performance Properties - SHRP Gyratory Compactor

Over the past two decades, Superpave mix design has been refined and most state DOTs have fully or partially adopted it. Unlike other state DOTs, Tennessee Department of Transportation (TDOT) is currently still using the Marshall mix design method for designing its fine graded asphalt mixtures. TDOT has also refined this method over the years by specifying certain criteria to be met. This method has served TDOT well in the past and continues to be effective. However, the Marshall method currently does not allow for design of larger stone mixes due to the size limitations in the design method. It also hinders the technical information exchange and communication of TDOT engineers, staff, and administrators with their counterparts from other state DOTs which adopted Superpave mix design. The research project aims to compare Marshall and Superpave mix design methods using typical TDOT asphalt mixtures and recommend an improved mix design method for TDOT. This proposed method should be able to keep the good aspects of both mix design methods, while enabling TDOT take advantage of technical advancement and making it easier for technical communication and information exchange. Purposes of the project are: 1) to compare different asphalt mixture design methods using TDOT typical asphalt mixtures, including TDOT refined Marshall method, currently specified Superpave System (AASHTO M323/R35/T312), the modified version of the Superpave system (NCHRP 573); 2) to recommend a modified mix design method combining the benefits of both Marshall and Superpave methods; 3) to recommend a mix design method for larger stone mixtures.

• Record URL:
  https://www.tn.gov/content/dam/tn/tdot/long-range-planning/research/final-reports/RES2016-02%20FINAL%20Report%20Revision%20-%20Approved.pdf
• 

Project

• Status: Completed
• Funding: $175,107.69
• Contract Numbers:

  RES2016-02

  IG1859001

• Sponsor Organizations:

  Tennessee Department of Transportation

  James K. Polk Building
  Fifth and Deaderick Street
  Nashville, TN  United States  37243-0349

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Managing Organizations:

  Tennessee Department of Transportation

  James K. Polk Building
  Fifth and Deaderick Street
  Nashville, TN  United States  37243-0349
• Project Managers:

  Chandler, Matthew

• Performing Organizations:

  University of Tennessee, Knoxville

  Knoxville, TN  United States 
• Principal Investigators:

  Huang, Baoshan

• Start Date: 20151001
• Expected Completion Date: 20191231
• Actual Completion Date: 20200630
• USDOT Program: Transportation, Planning, Research, and Development

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Mix design; Superpave
• Identifier Terms: AASHTO T 312
• Subject Areas: Materials; Pavements;

Filing Info

• Accession Number: 01708156
• Record Type: Research project
• Source Agency: Tennessee Department of Transportation
• Contract Numbers: RES2016-02, IG1859001
• Files: RIP
• Created Date: Jun 20 2019 5:03PM